Index: sources/bluetooth/BluetoothInterface.cpp
===================================================================
diff -u -rfb6d2ffcfd44a933380b21784bfaf5c827ec811d -r9dd6d10ac1164c651e8d536673641d1e90981207
--- sources/bluetooth/BluetoothInterface.cpp	(.../BluetoothInterface.cpp)	(revision fb6d2ffcfd44a933380b21784bfaf5c827ec811d)
+++ sources/bluetooth/BluetoothInterface.cpp	(.../BluetoothInterface.cpp)	(revision 9dd6d10ac1164c651e8d536673641d1e90981207)
@@ -1,4 +1,4 @@
-/*!
+/*!
  *
  * Copyright (c) 2021-2023 Diality Inc. - All Rights Reserved.
  * \copyright
@@ -541,6 +541,18 @@
  */
 void BluetoothInterface::onDeviceSelect(const BluetoothDeviceData &vDevice) {
     stopScan();
+
+    if ( isLocalValid() && isDeviceValid() ){
+        // Check pair status, if connected to a bt device already, disconnect before connecting to selected
+        // bt device to avoid "device connection error"
+        bool isPaired = _local->pairingStatus(_device->remoteAddress()) == QBluetoothLocalDevice::Paired;
+        bool isAuthPaired = _local->pairingStatus(_device->remoteAddress()) == QBluetoothLocalDevice::AuthorizedPaired;
+        if ( isPaired || isAuthPaired ) {
+            quitDevice();
+        }
+    }
+
+    // Proceed to connect to selected device
     _temp = QBluetoothDeviceInfo(QBluetoothAddress(vDevice.addr), vDevice.name, QBluetoothDeviceInfo::HealthBloodPressureMonitor);
     connectToDevice();
 }
@@ -596,6 +608,7 @@
  */
 void BluetoothInterface::onDeviceError(QLowEnergyController::Error vError)
 {
+    //DEBUG: qDebug()<< "Device Error " << vError;
     bool isErrorUnknown = (vError == QLowEnergyController::UnknownError);
     if ( isErrorUnknown ) {
         // When polling to reconnect to the remote device, the application encounters an unknown
@@ -606,6 +619,7 @@
             // Code is opting to set _reconnectionActive to true to allow polling to continue since the device
             // is still paired and the error encountered is due to not being able to connect to the remote device.
             _reconnectionActive = true;
+            //DEBUG: qDebug()<< "unknown error : reconnection set to true";
         }
     }